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API (American Petroleum Institute) is a leader in the development of petroleum and petrochemical equipment and operating standards covering topics that range from drill bits to environmental protection. These embrace proven, sound engineering and operating practices and safe, interchangeable equipment and materials. Many have been incorporated into state and federal regulations and adopted by ISO for worldwide acceptance.
Proving Systems: Small Volume Provers
Standard published on 1.7.1988
Selected format:Proving Systems: Tank Provers
Standard published on 1.5.1998
Selected format:Proving Systems: Master-Meter Provers, Fourth Edition
Standard published on 1.6.2016
Selected format:MPMS Chapter 4.6: Pulse Interpolation
Standard published on 1.10.2021
Selected format:Field Standard Test Measures, Third Edition
Standard published on 1.4.2009
Selected format:Operation of Proving Systems, 3rd Edition
Standard published on 1.7.2021
Selected format:Introduction to the Determination of the Volume of Displacement and Tank Provers, Second Edition
Standard published on 1.4.2022
Selected format:Determination of the Volume of Displacement and Tank Provers by the Gravimetric Method of Calibration, First Edition
Standard published on 1.10.2010
Selected format:Manual of Petroleum Measurement Standards, Chapter 4-Proving Systems, Section 9-Methods of Calibration for Displacement and Volumetric Tank Provers, Part 2-Determination of the Volume of Displacement and Tank Provers by the Waterdraw Method of Calibration, First Edition
Standard published on 1.12.2005
Selected format:Determination of the Volume of Displacement Provers by the Master Meter Method of Calibration, First Edition
Standard published on 1.4.2010
Selected format:Latest update: 2026-08-21 (Number of items: 2 298 377)
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